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Discovery of a strong 6.6 keV emission feature from EXO 1745248 after the superburst in 2011 October
Wataru B. Iwakiri, Motoko Serino, Tatehiro Mihara +4
We discover an unidentified strong emission feature in the X-ray spectrum of EXO 1745248 obtained by RXTE at 40 hr after the peak of a superburst. The structure was centered at…
The RS CVn type star GT Mus shows most energetic X-ray flares throughout the 2010s
Ryo Sasaki, Yohko Tsuboi, Wataru Iwakiri +14
We report that the RS CVn-type star GT Mus (HR 4492, HD 101379 + HD 101380) was the most active star in the X-ray sky in the last decade in terms of the scale of recurrent energeti…
The Peculiar X-ray Transient Swift J0840.7-3516: an Unusual Low Mass X-ray Binary or a Tidal Disruption Event?
Megumi Shidatsu, Wataru Iwakiri, Hitoshi Negoro +9
We report on the X-ray properties of the new transient Swift J0840.73516, discovered with Swift/BAT in 2020 February, using extensive data of Swift, MAXI, NICER, and NuSTAR. The…